package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@Slf4j
@RestController("userDishController")
@RequestMapping("/user/dish")
@Api(tags = "菜品接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("根据分类id查询菜品:{}", categoryId);

//        构造redis中的key，规则：dish_分类id
        String key = "dish_" + categoryId;
//        查询redis中是否存在菜品数据
        List<DishVO> dishVOS = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if (dishVOS != null && dishVOS.size() > 0) {
//            如果存在，直接返回
            return Result.success(dishVOS);
        }

        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
//        查询起售中的菜品
        dish.setStatus(StatusConstant.ENABLE);
//        如果不存在，查询数据库，将查询的数据放到redis中
        dishVOS = dishService.list(dish);
        redisTemplate.opsForValue().set(key, dishVOS);

        return Result.success(dishVOS);
    }
}
